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OSBM Bolt 
OSBM Bolt in rock outcrop, 60' W of road.
Location
Grid reference: SH 2164 8145.
Landranger 114: Anglesey.
Structure: Rock outcrop.
Waypoint: OS0891.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Holyhead,
2.82km to the northeast.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Caernarvon to Holyhead levelling line. The surveyor's description was OSBM Bolt in rock outcrop, 60' W of road.
Logged Visits
Logged on 30th May 2006 by iainmac. Condition: Couldn't find it.
Rock outcrop has stones/boulders piled on it so probably still there but covered.
Location
Grid reference: SH 2164 8145.
Landranger 114: Anglesey.
Structure: Rock outcrop.
Waypoint: OS0891.
Neighbouring Flush Brackets
| G5199 | Flush Bracket 80.62m to the east. |
| G4991 | Glan Gorsgoch Isaf 974.17m to the southeast. |
| G4992 | Capel Seilo 1.59km to the northeast. |
| G4990 | Porthdafarch South 2.06km to the southeast. |
| S7559 | Holyhead, Alderley Terrace 2.78km to the northeast. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Caernarvon to Holyhead levelling line. The surveyor's description was OSBM Bolt in rock outcrop, 60' W of road.
Logged Visits
Logged on 30th May 2006 by iainmac. Condition: Couldn't find it.
Rock outcrop has stones/boulders piled on it so probably still there but covered.
If you have any corrections or additions to this record, please let us know.